This topic examines the May 4th Movement, and its slogan is "Fighting for state power outside, eliminating national thieves inside". "Fighting for national rights abroad" refers to opposing imperialist countries to undermine China's sovereignty; "Excluding traitors from inside" refers to opposing the reactionary rule of the northern warlords who represent the interests of the landlord class, so it can reflect the anti-imperialist and anti-feudal nature, so D is chosen.